Never run out again of power for your devices with RAVPower's rechargeable batteries. Equipped with 350mAh of power, these batteries deliver fast performance. This set comes with unlimited charging options so you can recharge via any device with a USB port including wall chargers, car chargers, or external batteries. Supporting wide usage, these batteries are optimized to power high-drain devices such as Arlo security cameras, flashlights, digital cameras, and more!